Resin from Myroxylon toluifera, a tree native to northern South America used medicinally. Allergic reaction to organic compounds; benzoic esters, cinnamic esters, and vannilin. A close relative (cross-reacts) with balsam of Peru.

Combination of benzocaine, dibucaine hydochloride, and tetracaine hydrochloride. Used in dentistry and topical anti-itch, anti-pain medications; increased chance of sensitization due to use in inflamed skin. In cough syrups and hemorrhoidal preparations. Allergen in T.R.U.E. test.